these 2 derivations will be built:
  /nix/store/1gx8xqw4kqrdx0gzx0gznl39kkzfknil-flake-inputs.drv
  /nix/store/xwl7g6h3rd05zwmv77p4nxjmzd2j5fqf-check-flake-inputs.drv